三、句型
1）Why not do sth? =Why don’t you do sth? 【表建议】
2）What about =How about +名次或动名词或从句 【表询问或建议】
3）You’d better (not) do sth. 比较 It’s better to do sth.
4) There were twelve of us, including me and Tom. =me and Tom included
5) A museum has been built so that visitors can look at the cultural relics without casing any damage.
[so that 引导目的状语从句，注意：从句中谓语动词常带有may, might, can, could 等情态动词]
[without 介词＋动名词]
